Import 'std_stub' module from the ruduino crate

Author: dylanmckay

avr-atmega328p.json

@@ -0,0 +1,32 @@
+{
+  "arch": "avr",
+  "cpu": "atmega328p",
+  "data-layout": "e-P1-p:16:8-i8:8-i16:8-i32:8-i64:8-f32:8-f64:8-n8-a:8",
+  "env": "",
+  "executables": true,
+  "linker": "avr-gcc",
+  "linker-flavor": "gcc",
+  "linker-is-gnu": true,
+  "llvm-target": "avr-unknown-unknown",
+  "no-compiler-rt": true,
+  "os": "unknown",
+  "position-independent-executables": false,
+  "exe-suffix": ".elf",
+  "eh-frame-header": false,
+  "pre-link-args": {
+    "gcc": [
+      "-Os",
+      "-mmcu=atmega328p"
+    ]
+  },
+  "late-link-args": {
+    "gcc": [
+      "-lc",
+      "-lgcc"
+    ]
+  },
+  "target-c-int-width": "16",
+  "target-endian": "little",
+  "target-pointer-width": "16",
+  "vendor": "unknown"
+}

src/lib.rs

@@ -1,7 +1,16 @@
-#[cfg(test)]
-mod tests {
-    #[test]
-    fn it_works() {
-        assert_eq!(2 + 2, 4);
-    }
+//! Defines simple implementations of required language items that `libstd` normally defines.
+
+#![no_std]
+
+#![feature(lang_items)]
+
+#[lang = "eh_personality"]
+#[no_mangle]
+pub unsafe extern "C" fn rust_eh_personality() -> () {
 }
+
+#[panic_handler]
+fn panic(_info: &::core::panic::PanicInfo) -> ! {
+    loop {}
+}
+